tests: Add getopt test

tests/glibc/getopt.c

@@ -0,0 +1,27 @@
+#include <assert.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+
+int main() {
+	const char *shortopts = "f:";
+
+	const struct option longopts[] = {
+		{"foo", required_argument, NULL, 'f'},
+		{NULL, no_argument, NULL, 0}
+	};
+
+	int test_argc = 2;
+
+	char *test_argv[] = {
+		"dummy",
+		"--foo",
+		"abc"
+	};
+
+	int c;
+	c = getopt_long(test_argc, test_argv, shortopts, longopts, NULL);
+	assert(c == 'f');
+	c = getopt_long(test_argc, test_argv, shortopts, longopts, NULL);
+	assert(c == -1);
+}

tests/meson.build

@@ -10,6 +10,10 @@ posix_test_cases = [
 	'pthread_rwlock'
 ]
 
+glibc_test_cases = [
+	'getopt'
+]
+
 test_sources = [
 	crt
 ]
@@ -42,3 +46,16 @@ if not disable_posix_option
 		test('posix/' + f, exec)
 	endforeach
 endif
+
+# We never disable the posix option so glibc is gated behind the posix option here.
+if not disable_posix_option
+	foreach f : glibc_test_cases
+		exec = executable('glibc-' + f, ['glibc/' + f + '.c', test_sources],
+			link_with: libc, include_directories: libc_include_dirs,
+			build_rpath: meson.build_root(),
+			c_args: '-no-pie',
+			link_args: ['-Wl,--dynamic-linker=' + meson.build_root() + '/ld.so',
+				'-no-pie'])
+		test('glibc/' + f, exec)
+	endforeach
+endif